Transporting apparatus, developing apparatus and image forming apparatus

Abstract

A developing apparatus includes a developer vessel that is provided with a first transporting path, a second transporting path and a third transporting path. The first transporting path and the second transporting path are communicated with each other, and a developer is circulated in the first transporting path and the second transporting path. The third transporting path has a developer discharge port and is provided in an upstream side in a transporting direction of the developer in the second transporting path. Furthermore, an annular plate-like first regulation portion is arranged in an end portion of the second transporting path in a third transporting path side and an annular plate-like second regulation portion opposite to the first regulation portion with a predetermined interval is arranged in an end portion of the third transporting path in a second transporting path side.

What is claimed is: 
     
       1. A transporting apparatus, comprising:
 a first transporting path that is provided in a developer vessel; 
 a first transporting member that is provided in the first transporting path to transport a developer while churning; 
 a second transporting path that is provided in the developer vessel in parallel with the first transporting path to be communicated with the first transporting path via communicating paths that are formed in both end portions in a longitudinal direction of a boundary wall between the first transporting path and the second transporting path; 
 a second transporting member that is provided in the second transporting path to transport a developer while churning in a reverse direction to the first transporting member and supply the developer to a developer bearing member; 
 a third transporting path that has a developer discharge port, and is connected, in the developer vessel, to the second transporting path in an upstream side of a transporting direction of the developer by the second transporting member; 
 a third transporting member that is provided in the third transporting path to transport a developer that overflows to the third transporting path from the second transporting path to the developer discharge port; 
 an annular plate-like first regulation portion that is arranged in an end portion of the second transporting path in a third transporting path side to be projected from an outer peripheral surface of an axis of the second transporting member and extended in a circumferential direction; and 
 an annular plate-like second regulation portion that is arranged opposite to the first regulation portion with a predetermined interval in an end portion of the third transporting path in a second transporting path side, wherein the second regulation portion is provided on an inner circumferential surface of the third transporting path. 
 
     
     
       2. The transporting apparatus according to  claim 1 , wherein the second regulation portion is provided on an outer peripheral surface of an axis of the third transporting member. 
     
     
       3. The transporting apparatus according to  claim 1 , wherein the third transporting path is formed coaxially with the second transporting path, and an inner diameter thereof is smaller than an inner diameter of the second transporting path. 
     
     
       4. The transporting apparatus according to  claim 1 , wherein the second transporting path has an expanded portion that is formed to be projected to a third transporting path side in comparison to the communicating path that is arranged in a third transporting path side. 
     
     
       5. The transporting apparatus according to  claim 1 , further comprising an annular plate-like third regulation portion that is arranged in an end portion of the third transporting path in a second transporting path side to be opposed to the second regulation portion with a predetermined interval. 
     
     
       6. A developing apparatus comprising the transporting apparatus according to  claim 1  and the developer bearing member. 
     
     
       7. An image forming apparatus comprising the developing apparatus according to  claim 6 .